The unit pictured is the SFL 075, which is 750kg capacity, but the range spans capacities from 0.5-9t.
The range is designed in accordance with EN13157 with the manufacturer highlighting that the “brake is always under lock despite the load situation.”
It adopts a new patented chain-pulling device function which can unlock the brake in no-load operating condition so the load chain can be pulled up and down at speed. In case of unexpected load being suddenly added during the no-load chain-pulling process, the brake can immediately lock the brake. It can indicate and display the two different working status, for example, the “working under no-load chain pulling condition” and “working under loaded operation.”
The loose end of the load chain is equipped with an adjustable chain stop device, with which the operator “can quickly adujst the position of the chain according to the practical application, so as to avoid a violent crash due to the chain slipping down at speed,” L&H said.
It added that its new lever hoist addresses issues raised in a guidance recently published by the International Marine Contractors Association (IMCA) regarding the use of such equipment underwater (or sub-sea).
During the 1990s there were numerous incidents in the offshore industry when hand chain blocks and lever hoists failed in some way, resulting in a dropped load or other dangerous occurrences. The Offshore Division of the UK’s Health & Safety Executive (HSEOSD) commissioned an investigation into the causes of failure and the resultant report identified several key factors which needed addressing.
L&H admitted that its unit may need some tweaking (protective coating, for example) but it is confident its lever hoist could meet these requirements.
For example, failure at light load is one of the more frequent causes of incidents, the investigation discovered. “Our new safety lever hoist has solved this problem,” claimed L&H.
The guidance said there is a requirement that the chain stop which prevents the chain from running out should be capable of withstanding at least 2.5 times the maximum tension in the load chain at WLL.
L&H said its adjustable chain stop device on the loose end has the capability of withstanding at least 2.5 times the maximum tension in the load chain.
